Waste Water Engineering 3.0 ml of raw sewage is diluted to 300 ml. The D.O. concentration of the diluted sample at the beginning of the test was 8 mg/l. After 5 day-incubation at 20°C, the D.O. concentration was 5 mg/l. The BOD of raw sewerage is 200 mg/l 400 mg/l 100 mg/l 300 mg/l 200 mg/l 400 mg/l 100 mg/l 300 mg/l ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Aerobic activity is maximum In freshly produced sewage None of these At sewer pipes In sewer treatment plants In freshly produced sewage None of these At sewer pipes In sewer treatment plants ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The following is the physical characteristic of sewage Colour All listed here Turbidity Odour Colour All listed here Turbidity Odour ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Lead caulked joints are used for laying Stone ware pipes Earthenware pipes I. pipes G.I. pipes Stone ware pipes Earthenware pipes I. pipes G.I. pipes ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering A manhole is generally provided at each Junction Change of gradient Bend All of these Junction Change of gradient Bend All of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering Hazen’s formula VS = 418 (GS – Gw)d [(3T + 70)/100] is used for the settlement velocity of the particles of diameter Less than 0.05 mm Less than 0.01 mm Less than 0.1 mm Greater than 0.1 mm Less than 0.05 mm Less than 0.01 mm Less than 0.1 mm Greater than 0.1 mm ANSWER DOWNLOAD EXAMIANS APP
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